Plan a flight · Sun 9:41 pm EDT (01:41 UTC)

Oscoda/Wurtsmith Airport to San Antonio International OSC → SAT

1,147 nautical miles (1,320 statute miles) southwest on a straight line, true course 224°, about 231° magnetic at the departure end (variation 7W). At 120 knots that is 9 h 43 min at the quickest height in today's winds (30,000 ft, a 2-knot headwind), arriving about 6:24 am CDT (11:24 UTC), after sunset at the destination. Right now OSC is VFR, wind from the south-southwest (210°) at 6 knots; SAT is VFR, wind from the south-southeast (150°) at 11 knots. For planning, not a briefing: the legal preflight briefing comes from Flight Service (1-800-WX-BRIEF) or the FAA's own tools. Airlines fly this pair: 1 flights in the DOT's last twelve reported months, the route's page.

The route the straight line, the warnings crossed, restrictions, pilot reports and the airports along the way · click a mark for its words

Green, blue, red and purple airport dots are the flying conditions reported there now (VFR, marginal VFR, IFR, low IFR); grey means no report. Red areas are SIGMETs, orange areas AIRMETs, hatched red areas temporary flight restrictions. Map tiles: OpenFreeMap, data © OpenStreetMap contributors.

Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of

No SIGMET or AIRMET covers any part of this route right now.

A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from OSC.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

A320 at 33,000 ft, 34 nm southeast, 8:36 pm EDT (00:36 UTC): moderate turbulence above 33,000 ft, remarks: zob. 150 nm along the route, 34 nm southeast of the line.
as filed, and in English
```
JXN UA /OV JXN280030/TM 0036/FL330/TP A320/TB OCNL MOD 330/RM ZOB
```
Report
a routine report filed through JXN
Where
30 nm west (280°) of JXN
Time
00:36 UTC
Height
at 33,000 ft
Aircraft
A320
Turbulence
occasional moderate at 33,000 ft
Remarks
zob
A21N at 31,000 ft, 9 nm north, 8:39 pm EDT (00:39 UTC): light turbulence above 31,000 ft, remarks: zob. 80 nm along the route, 9 nm north of the line.
as filed, and in English
```
MOP UA /OV MOP/TM 0039/FL310/TP A21N/TB CONS LGT 310/RM ZOB
```
Report
a routine report filed through MOP
Where
over MOP
Time
00:39 UTC
Height
at 31,000 ft
Aircraft
A21N
Turbulence
continuous light at 31,000 ft
Remarks
zob
E170 at 21,000 ft, 46 nm southeast, 9:07 pm EDT (01:07 UTC): light chop turbulence, remarks: during the climb zob. 120 nm along the route, 46 nm southeast of the line.
as filed, and in English
```
LAN UA /OV LAN180020/TM 0107/FL210/TP E170/TB LGHT CHOP/RM DURC ZOB
```
Report
a routine report filed through LAN
Where
20 nm south (180°) of LAN
Time
01:07 UTC
Height
at 21,000 ft
Aircraft
E170
Turbulence
lght chop
Remarks
during the climb zob
F2TH at 3,100 ft, 29 nm southeast, 7:40 pm EDT (23:40 UTC): remarks: tops 3,100 ft. 150 nm along the route, 29 nm southeast of the line.
as filed, and in English
```
AZO UA /OV BTL/TM 2340/FL031/TP F2TH/RM TOPS 031
```
Report
a routine report filed through AZO
Where
over BTL
Time
23:40 UTC
Height
at 3,100 ft
Aircraft
F2TH
Remarks
tops 3,100 ft
B38M at 31,000 ft, 22 nm southeast, 8:04 pm EDT (00:04 UTC): light chop turbulence up to 31,000 ft. 160 nm along the route, 22 nm southeast of the line.
as filed, and in English
```
AZO UA /OV AZO/TM 0004/FL310/TP B38M/TB CONS LGT CHOP 310 BLO
```
Report
a routine report filed through AZO
Where
over AZO
Time
00:04 UTC
Height
at 31,000 ft
Aircraft
B38M
Turbulence
continuous light chop at 31,000 ft below
CRJ7 at 17,000 ft, 23 nm northwest, 8:04 pm EDT (00:04 UTC): no turbulence. 209 nm along the route, 23 nm northwest of the line.
as filed, and in English
```
BEH UA /OV ELX270040/TM 0004/FL170/TP CRJ7/TB NEG
```
Report
a routine report filed through BEH
Where
40 nm west (270°) of ELX
Time
00:04 UTC
Height
at 17,000 ft
Aircraft
CRJ7
Turbulence
none
B39M at 35,000 ft, 17 nm northwest, 8:29 pm EDT (00:29 UTC): no turbulence, remarks: smooth. 249 nm along the route, 17 nm northwest of the line.
as filed, and in English
```
IKK UA /OV CGT/TM 0029/FL350/TP B39M/TB NEG/RM SMOOTH
```
Report
a routine report filed through IKK
Where
over CGT
Time
00:29 UTC
Height
at 35,000 ft
Aircraft
B39M
Turbulence
none
Remarks
smooth
CRJ7 at 36,000 ft, 47 nm southeast, 8:10 pm EDT (00:10 UTC): no turbulence, remarks: ZME20. 748 nm along the route, 47 nm southeast of the line.
as filed, and in English
```
HOT UA /OV HOT/TM 0010/FL360/TP CRJ7/TB NEG/RM ZME20
```
Report
a routine report filed through HOT
Where
over HOT
Time
00:10 UTC
Height
at 36,000 ft
Aircraft
CRJ7
Turbulence
none
Remarks
ZME20

Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 UTC · at 120 knots true airspeed

The westbound cruising heights for this course (VFR: even thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 10 forecast points nearest it (TVC, MKG, JOT, SPI, STL, SGF, FSM, DAL, CLL, SAT). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
4,500 ft	210° at 12 kt	+12 kt		108 kt	10 h 37 min	7:18 am CDT (12:18 UTC)
6,500 ft	230° at 12 kt	+12 kt	15 °C	108 kt	10 h 37 min	7:18 am CDT (12:18 UTC)
8,500 ft	250° at 15 kt	+13 kt	12 °C	107 kt	10 h 43 min	7:24 am CDT (12:24 UTC)
10,500 ft	260° at 16 kt	+12 kt	8 °C	108 kt	10 h 37 min	7:18 am CDT (12:18 UTC)
12,500 ft	270° at 16 kt	+10 kt	5 °C	110 kt	10 h 26 min	7:07 am CDT (12:07 UTC)
14,500 ft	280° at 16 kt	+9 kt	1 °C	111 kt	10 h 20 min	7:01 am CDT (12:01 UTC)
16,500 ft	280° at 17 kt	+8 kt	-4 °C	112 kt	10 h 14 min	6:55 am CDT (11:55 UTC)
18,000 ft FL180	280° at 18 kt	+8 kt	-7 °C	112 kt	10 h 14 min	6:55 am CDT (11:55 UTC)
24,000 ft FL240	300° at 21 kt	+3 kt	-18 °C	117 kt	9 h 48 min	6:29 am CDT (11:29 UTC)
30,000 ft FL300	310° at 38 kt	+2 kt	-33 °C	118 kt	9 h 43 min	6:24 am CDT (11:24 UTC)
34,000 ft FL340	310° at 41 kt	+2 kt	-43 °C	118 kt	9 h 43 min	6:24 am CDT (11:24 UTC)
39,000 ft FL390	310° at 48 kt	+2 kt	-51 °C	118 kt	9 h 43 min	6:24 am CDT (11:24 UTC)

Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 UTC; temperatures above 24,000 ft are below zero. Heights are above sea level; a height is left out when the forecast has no wind for it over most of the line (the ground is higher). Ground speed is the airspeed less the headwind; the time en route is for the straight line and ignores climb, descent and routing around weather.

The forecast points as issued

Point	From	3,000	6,000	9,000	12,000	18,000	24,000	30,000	34,000	39,000
TVC	used from 0 nm out; 85 nm from the line	210/17	290/14 15°	310/20 9°	310/18 2°	310/24 -11°	320/35 -22°	320/53 -39°	310/45 -49°	290/58 -51°
MKG	used from 50 nm out; 76 nm from the line	250/5	320/10 15°	310/19 9°	320/21 3°	310/23 -10°	330/37 -22°	330/51 -38°	320/44 -47°	300/60 -49°
JOT	used from 199 nm out; 60 nm from the line	230/11	290/12 16°	300/19 10°	320/19 4°	300/17 -9°	330/31 -20°	320/49 -37°	320/53 -45°	320/67 -49°
SPI	used from 349 nm out; 31 nm from the line	210/13	260/11 17°	270/18 10°	290/21 4°	310/20 -8°	330/25 -19°	320/49 -34°	320/60 -44°	320/59 -50°
STL	used from 449 nm out; 13 nm from the line	210/13	260/16 17°	270/21 10°	280/24 5°	310/20 -7°	320/22 -18°	320/44 -33°	320/59 -43°	310/69 -51°
SGF	used from 549 nm out; 82 nm from the line	210/21	210/21 16°	240/28 12°	260/24 7°	280/21 -6°	280/26 -18°	290/38 -31°	290/37 -41°	300/49 -52°
FSM	used from 648 nm out; 77 nm from the line	200/18	210/19 15°	230/22 13°	250/18 7°	270/20 -5°	280/24 -16°	280/35 -30°	290/37 -40°	300/40 -52°
DAL	used from 848 nm out; 79 nm from the line	180/21	190/24 15°	230/20 12°	220/23 8°	240/22 -5°	230/18 -15°	280/33 -29°	280/36 -39°	300/33 -52°
CLL	used from 997 nm out; 54 nm from the line	160/18	190/18 16°	200/19 12°	220/14 7°	260/18 -5°	250/20 -13°	290/29 -29°	290/31 -40°	300/22 -53°
SAT	used from 1097 nm out; 25 nm from the line	130/22	140/24 18°	170/19 13°	190/13 7°	240/15 -4°	220/14 -13°	270/11 -28°	280/10 -40°	310/18 -51°

The weather now: both ends and the airports along the way public airports with a weather report within 25 nm of the line, one for each stretch

Airport	Where	Conditions	Wind	Visibility	Ceiling	Elevation	Reported
OSC Oscoda, MI	departure	VFR	from the south-southwest (210°) at 6 knots	10+ mi	none	633 ft	9:35 pm EDT (01:35 UTC)
MBS Saginaw, MI	60 nm out, 16 nm southeast of the line, tower	VFR	from the south (180°) at 5 knots	10+ mi	none	668 ft	00:53 UTC
GRR Grand Rapids, MI	130 nm out, 4 nm west of the line, tower	VFR Sky: a few clouds at 25,000 feet	from the south (170°) at 5 knots	10+ mi	none	793 ft	00:53 UTC
GYY Gary/Chicago, IN	249 nm out, 16 nm northwest of the line, tower	VFR	calm	8 mi	none	596 ft	00:50 UTC
ALN Alton/St Louis, IL	449 nm out, 3 nm north of the line, tower	VFR	from the southeast (140°) at 6 knots	10+ mi	none	543 ft	00:50 UTC
CPS Cahokia/St Louis, IL	469 nm out, 7 nm east of the line, tower	VFR	from the south-southeast (160°) at 5 knots	10+ mi	none	412 ft	00:53 UTC
BPK Mountain Home, AR	638 nm out, 2 nm east of the line	VFR	from the southwest (220°) at 4 knots	10+ mi	none	928 ft	00:53 UTC
MEZ Mena, AR	778 nm out, 2 nm northeast of the line	VFR	calm	10+ mi	none	1,079 ft	23:35 UTC
GVT Greenville, TX	898 nm out, 22 nm northwest of the line, tower	VFR	from the south-southeast (160°) at 10 knots	10+ mi	none	534 ft	23:15 UTC
CNW Waco, TX	997 nm out, 14 nm west of the line, tower	VFR	from the south-southeast (150°) at 7 knots	10+ mi	none	470 ft	01:35 UTC
GTU Georgetown, TX	1067 nm out, 5 nm northwest of the line, tower	VFR	from the south-southeast (150°) at 7 knots	10+ mi	none	789 ft	00:55 UTC
SAT San Antonio, TX	destination	VFR Sky: a few clouds at 20,000 feet	from the south-southeast (150°) at 11 knots	10+ mi	none	809 ft	7:51 pm CDT (00:51 UTC)

The highest airport on this list sits at 1,079 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SAT when you get there the forecast at the estimated arrival, 6:24 am CDT (11:24 UTC)

Wind from the east-southeast at 5 knots, visibility more than 6 miles, a broken layer at 1,200 feet marginal VFR

The whole forecast for SAT

From Sun 7:00 pm CDT (00:00 UTC): wind from the south-southeast at 15 knots, visibility more than 6 miles, a few clouds at 6,000 feet, scattered clouds at 25,000 feet
From Mon 12:00 am CDT (05:00 UTC): wind from the southeast at 9 knots, visibility more than 6 miles, scattered clouds at 1,200 feet
From Mon 6:00 am CDT (11:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, a broken layer at 1,200 feet
From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southeast at 8 knots, visibility more than 6 miles, a broken layer at 2,500 feet
From Mon 2:00 pm CDT (19:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a broken layer at 5,000 feet

Temporary flight restrictions on the line or within 25 nm of it

6/0543 MCGREGOR, TX 20 nm from the route, 1027 nm along the route · security · ZFW
6/5849 Austin, TX, Friday, October 2, 2026 through Monday, October 12, 2026 UTC 5 nm from the route, 1087 nm along the route · drones kept away from a public gathering · until 12 October · ZHU

Daylight

Sunset at OSC 6:54 pm EDT (22:54 UTC), at SAT 7:06 pm CDT (00:06 UTC) (civil twilight ends 7:30 pm CDT (00:30 UTC)). At 120 knots the arrival at SAT is before sunrise there (7:33 am CDT (12:33 UTC)).

Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.

Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads

Radar now, the central Great Lakes · loop National Weather Service

Radar now, the upper Mississippi valley · loop National Weather Service

Radar now, the lower Mississippi valley · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

Sources: the Aviation Weather Center's data service (SIGMETs, AIRMETs, graphical AIRMETs, pilot reports, winds and temperatures aloft, observations and terminal forecasts), the National Weather Service radar, the Weather Prediction Center's charts, the FAA's temporary flight restriction list and shapes, and the FAA's airport file for the positions, elevations and magnetic variation. Fetched when the page is viewed and kept a few minutes. Each leg is the straight line between its two airports; airways, terrain and airspace are not considered. The airports in detail: Oscoda/Wurtsmith Airport, San Antonio International.